This extension was part of Blender 4.1 bundled add-ons. It is now offered as it is, with limited supported.
No changelog for this release.
This extension does not require special permissions.
Same here: draw a few lines, press "Add surface" - Blender crashes.
One of the best ways to do retopo. id like to make a suggestion though . For when using annotation to create topology to make the different annotation layers be used to create different parts of topology when clicking add surfaces button . as of now they either get ignored and erased if not selected. it just be nice to draw out the main loops like eyes mouth etc. and then hit ad surface and get all the loops in one click.